In Subdistrict B, the underlying district regulations shall be modified by the provisions of this Section.

1. Street wall location
   
   In Manufacturing Districts, 30 percent of the street wall shall be located within eight feet of the street line and shall extend to at least the minimum base height specified in paragraph (b) of this Section, or the height of the building, whichever is lower.
   
   In Mixed Use Districts, the street wall location provisions of paragraph (a) of Section 123-651 shall apply, except that the street wall shall extend to at least the minimum base height specified in paragraph (b) of this Section.
2. Minimum and maximum base heights
   
   In all districts, street walls shall rise without setback to a minimum base height set forth in this paragraph (b) or the height of the building, whichever is less, and may rise to a maximum base height as set forth in this paragraph (b). In Manufacturing Districts, minimum and maximum base heights and maximum heights of buildings or other structures shall be as set forth in Table 1 below. In Mixed Use Districts, such regulations shall be as set forth in Table 2.

    

   Table 1

   MINIMUM BASE HEIGHT, MAXIMUM BASE HEIGHT, AND MAXIMUM BUILDING HEIGHT – FOR M1-4 DISTRICTS (in feet)

   	Minimum base height	Maximum base height	Maximum building height
   in Subarea B1	15	95	115
   in Subarea B2	15	65	85

    

   Table 2

   MINIMUM BASE HEIGHT, MAXIMUM BASE HEIGHT, AND MAXIMUM BUILDING HEIGHT – FOR MIXED USE DISTRICTS (in feet)

   	Minimum base height	Maximum base height	Maximum building height
   M1-4/R6B	30	45	55
   M1-4/R6A	40	65	85
   M1-4/R7A	40	75	95
   M1-4/R7X	60	105	145

   For zoning lots with a lot area greater than or equal to 20,000 square feet, and located in a Manufacturing District, a building containing non-residential uses may exceed the maximum building heights established in Table 1 by 30 feet.
   
   For zoning lots adjoining the portion of Degraw Street located between Nevins Street and Third Avenue, the heights listed in Table 2 are modified so that within 100 feet of Degraw Street, the maximum base height is 95 feet, and the maximum building height is 125 feet.
3. Setback requirements
   
   At a height not lower than the minimum base height or higher than the maximum base height, a setback shall be provided which complies with the requirements of Section 23-433 (Standard setback regulations).